It's interesting how they are only restricting online games.
Games where young frustrated [0] [1] Chinese teenagers could talk relatively freely with others from different regions of China. Or god forbid, learn English and have contacts with westerners. Better to keep them grinding on shaving a few tenth of a second on basic algebra problems for the Gaokao. That will better prepare them for the factories.
[0] https://www.washingtonpost.com/graphics/2018/world/too-many-...
[1] https://www.newsweek.com/2015/06/05/gender-imbalance-china-o...